Anesthetizing apparatus



June l0,',f1930. J. A. `HEIDBRINK 'ANIESTHETIZ ING APPARATUS Filed Feb. 23, 1924 4 Sheets-Sheet 2 l NR N j n E T A A. Y

June 10, 1930. 1 A, HEmBRINK 1,763,305

ANESTHETI Z ING APPARATUS Filed Feb. 23. 1924 4 Sheets-Sheet 5 las A TToR/vsvs.

ANES THE'T ZYI NG ArIARATUS A 7' TORNE Y6.

Patentedy June 10,

PATE-NT OFFICE JAY A. HEIDBRINK, OF MINNEAPOLIS, MINNESOTA ANESTHETIZING APPARATUS Application lcd February 23, 1924. Serial No. 694,486.

My invention relates to anaesthetizing apparatus and particularly to apparatus of this kind for use in obstetrical cases in which it is generally desirable to administer anaesthetizing gases, and sometimes pure oxygen to the prospectivemother, and in which it is often desirable to administer pure oxygen to the child after birth. An object of the inven- ,tion is to provide an apparatus by means of I which a plurality of gases such as oxygen and nitrous oxid may be readily 'delivered from sources of supply inthe following different ways. l v,

1. A properly proportioned nitrous oxidoxygen mixture may be delivered to a cus-l be delivered y to the 25 oxid be delivered at the same time to the mainv inhaler. l

The full objects and advantages of my inventionwill appear in connection with the -d'etailed description, and the novel features of my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings which illustrate one form in whichmy invention may be embodied, Fig. 1 is a plan view of the apparatus with, a small portion thereof shown in section. Fig. 2 is a view in section on the Nline 2 2 of Fig. 4. Fig. 3 is a view in section on the line 3-3 of Fig. 1. Fig. 4 is a view in section on the-line 44 of Fig. 2. Fig. 5 is a View mostly in section on the line 5-4-45 of Fig.

1. Fig. 6 is a view in section on the line 6-6 of Fig. 2. Fig. 7 is a view in section and on reduced scale on the line 7-7 of Fig. 4. Fig. 8 is a view in section on the line 8-8 of' Fig. 4i 2. Fig. 9 is a view in section on the line 9-9 of Fig. 10. Fig. 10 is a view in section on the line 10-10 of Fig. 9. Fig. vv11 is a view in section on the line 11-11 of Fig. 12. Fig. 12

is a View in section on the line 12-12 of Fig.-

As 'shown in the drawings,l there is a pair of arms 14,l 16, the outer ends of which are providedwith yokes 18 and 20 within which the heads of gas containers 22 and 24 are adapted to be secured by set screws 26 and The container 22 is intended for holding oxygen andthe ycontainer 24 is intended for holding` nitrous-oxid. The arms 14 and 16 contain longitudinal passageways 30 and4 32 as shown in Fig.3 with which the gas containers are adapted to be placed in communication by means of needle valves 34 and 36 and The arms 14, 16 extend out from a central member-'8 Controlling devices designated in general by the numerals 40 and 42 are ari aranged for cooperation with the passageways 30 and 32, the inner ends of which communicate with downwardly turnedfperforations 44 and 46 formed in blocks 48 and 50,' rigidly sec-ured in tubular members 52 and 54 formingr part of the controlling devices 40 and 42 and formed integrally with the member 38. Slidable blocks 56 and 58 are placed in the tubular members 52 and 54 and theupper ends of these blocks have annular langes v60 and 62 containing fiber plugs adapted to engage the outlet ends of the perforations 44 and 46.

` which communicate with thereducing valves.

The blocks 56 and 58 are held resiliently upward by springs 64 and 66, and these blocks may be depressed by staplelike members 68 and 70 which extend loosely through openings formed'in the fixed blocks 48 and 50. The staples 68 and 7 0 at their upper ends are engaged by the lower surfaces of diaphragms 72 and 74 forming the upper walls of chambers 76 and 78. Coiled springs 8() and'82 rest upon the upper surfaces of the diaphragms 72 and 74 and the tension of these springs may be regulated by screws 84 and 86. There are a pair of lugs 88 and 90 formed on the front. of the central memberV as best shown in Fig. 7 These lug's'have openings in communication with the chambers 7 Gand 78 and these openings are screwthreaded to receive the upper ends of tubes 92 and 94 having lower enlarged portions 96 and 98 threaded into which are cap members having 106, 108 through openings in which the tubes 92 and 94 extend, the upper sides of the arms being engaged by the lugs 88 and 90 and the lower sides ofthe arms beingfengaged by shoulders on the enlarged tubular portions 96 and 98. The arms 106 and108 contain passageways 110 and '112, the rear ends of which are in communication with ports 114 and 116 in the tubes 92 and 94. The passageway 112 leads into a chamber 118 in the valve casing 104I as shown in Fig. 4 and the Dassageway 110 leads into a space 120 in the valve casing above the chamber 118 as shown in Fig. 6, the said space and chamber being separated by a wall having an opening pro-l vided with a tube 122 extending down into the chamber 118. The upper end of the tube 122 constitutes a valve seat for a valve 124 having a stem 126 extending down through the tube 122. The upper portion of this tube has an enlarged bore so that when the valve A124 is lifted from its seat, the space 120 is in communication with a port 128 opening into the chamber 118. A disk 130 is secured to the lower end of the valve stem 126 and this disk rests upon the upper surface of a diaphragm 132 which constitutes the lower wall of the chamber 118. V'The disk 130 has an opening in which a pin 134 fits with sliding engagement so that this disk is guided for up and down movements, the disk being held down normally by a coiled spring 135.. Underneath the diaphragm 132 is a space in communication with the hollow interior ofa tubular member 136 having a flanged head 138. The member 136 has inlet ports 140 conected by a tube 142 with outlet ports 144 in the cap member which is connected with the tube 94 as shown in Fig. 4. The tube 142 is held in place by the flanged hea-ds 102 and 138. The chamber 118 constitutes a mixing chamber and it has an outlet port 146 surrounded by a nipple 148 whichy in use of the apparatus is connected by suitable tubing with an inhaler, it being understood that a customary rebreathling bag may be attached at any suitable place in this connection and that a well known shut-4,

off valve is provided. An auxiliary valve casing 150 is attached to the main valve casing 104 and this auxiliary casing contains a hollow plug valve 152 having an operating handle 154. The auxiliary casing 150 contains a passageway 158, leading to an inlet port 158 inthe main casing 104. The auxiliary casing 150 contains a secondpassageway 160 which'is in communication with the interior of a tubular member 162 into the lower end of which is threaded a cap member havingl a flanged head 164. Inlet ports 166 in the cap portion of the tubular member 162 are connected by a tub'e 168 with outlet ports 170 in the 'cap member attached to the tube 92 leading from the oxygen chamber 76. The plug valve 152 isv provided with a pair of upper ports 17 2 and 174 either one of which A112 into the mixing chamber 118.

may be brought into register with the passageway 160 when the .plug valve is turned through 180. The plug valve is 4provided with a lower port 176 which is directly beneath the port 172 and which registers with the passageway 156 leading to the mixing chamber 118 when the pluvr valve is in the position shown in Fig. 8. l 'he plug valve is further provided with an intermediate port 178 extending at right angles to the port 172 and 174 and adapted when the plug valve is in the position shown in Fig. 12, to register with a passageway 180 in the casing 150 and leading through a nipple 182 adapted to be connected by a small tube with an inhaler for administering oxygen to a baby. The oxygen chamber 76 is'connected by a pipe 184 with a gauge 186 which registers the percentage ofoxygen in the mixture when a mixture of oxygen and nitrous ox1d 1s admml vmixture otoxygen and nitrous oxid to the patient, the plug valve 152 is in the position shown in Figs. 9 and 10 so that oxygen cannot get past this valve. The nitrous oxid which is admitted passes into the nitrous'oxid chamber 78 from which as will be apparent from Fig. 4 it goes through the passageway lThe pressure of the nitrous oxid acting through the ports 140 and 144 and tube 142 is.exerted upon the lower surface of the diaphragm 132, thereby lifting-the valve 124 andV Vadmitting oxygen into the mixing chamber l when the shutoff valve is opened, whereby the pressure in the chamber 118 is reduced, the amount of oxygen being determined by the lift of the valve, and hence being propory' tionate to the pressure of the nitrous oxid and the number of gallons thereof delivered per minute and indicated on the gauge 190. The amount of oxygen will be automatically increased or decreased in proper proportion to any increase or decrease in the delivery of nitrous oxid and the vpercentage of oxygen in the mixture will beindicated on the rauge 186. By referring to Fig. 6, it will be seen that the oxygen passes from the oxygen chamber 76 through the passageway 110 to thespace above the valve 124. In order to deliver pure nitrous oxid, it is merely necessary to shut off the supply of oxygen. In'order to deliver pure oxygen, however, it is not suiiicient merely to shut off the supply of nitrous oxid since the'pressure of the latter causes the proper percentage of oxygen to be y suppliedand the' shutting-.olf ofthenitrous x1 also 'shuts olf all supply `ofoxygen past p the valve 1245 Therefore, thejplug valv'e152 is turned into the position shown 1n Fig. 8

whereupon oxygen iiows through this'valve V and passes into the chamber 118 for deliver to the inhaler.` When it is desired to a minister vpure oxygen to the child, the plug` 'valve 152 is turned into the position shown l in Figs. 11 and 12 whereupon oxygen passes through this valve into the passageway 180 and thence to the baby inhaler. It is obvious that when pure oxygen is beingdelivered in this way to the baby inhaler, the mixture of oxygen and nitrous .oxid may at the same time be -delivered from the mixin (Y B chamber 148 to the main inhaler.

I claim:

1.' An anaesthetizing apparatus having a mixing chamber, means for supplying thereto from independent sources of supply a plurality of gases under pressure, aconnection for an inhaler leading from said mixing chamber, means for shutting off the supply of gases to said mixing chamber, a valve casing,

an adjustable valve in said casing, a passage,-

way .connecting said valve casing with one of said sources, a passageway connecting said valve casing with said mixin chamber, and a: connectlon for a second 'inhaler leading from sa1d valve casing, said valve hamng ports so arranged that for diierentpositions l' mixing'chamber, meansl thereof gas from saidlast mentioned source may be delivered into said second inhaler or intol said last mentioned passageway as .desired.\

2. An anaesthetiz ing from the. source offsupplyof oxygen-'fte said plug valve, a paageway leading from' said plug'valve to said mixing chamber, and

a connection for a second inhaler'leading from said valve casing, said rotatable plug valve containing Vports so arranged that for diiierent positions thereof oxygen may be ldelivered through said casing into saidse'cond inhaler connectionor into said last mentioned passageway orl may be shut off from passing through said auxiliary casing as desired.

3. An anaesthetizing apparatus having a mixing chamber, means for supplying thereto nitrous oxid and oxygen from independent sources of supply, controlling devices for thereto from independent sources of supply the passages leading to said mixing chamber, said controlling devices containing gas chambers for nitrous oxid and oxygen respectively, a main casing containing said vmixing chamber, a main inhaler connection leading lfrom. ,said` mixing chamber, a passageway leading from said nitrous loxid chamber to said, mixin chamber, a valve controllingan opening or oxygen into said LmiXing-chamber. means for causing said'- valve to be opened to an extent in proportion to thepressur'e of gas in said nitrous oxid chamber, a passagewaydeading from said oxygen chamber to said Valve, anauxiliary casing, a rotatable lug valve in said casing,l a passageway leading from said oxygen chamber to said plug valve, a passageway leading from said plug valve to said mixing chamber, and a baby inhaler connection leading from said auxiliary casing, said rotatable plug valve containing ports so arranged that for diierent positions thereof oxygen may be delivered through said auxiliary casing into said baby inhaler connection or\into said i last mentioned passageway, or may be shut oil from passing through said auxiliary casing as desired.

14;. An anaesthetizing apparatus having a mixing chamber, means for supplying thereto nitrous oxid and oxygen from independent sources of supply, controlling devices for the passages leadingto said: mixing chamber, said controlling devices containing gas chambers for nitrous oxid and oxygen respectively, a main casing containing said mixing chamber, a diaphragm constituting one of the walls of said mixing chamber. a passageway leading from said nitrous oxid chamber into Ysaid mixing chamber, a main inhaler connection leading from said mixing chamber.- a passageway leading from said nitrous oxid Cil chamber to the outside surface of said dia- 'phragnn a valve controlling an opening for oxygen into said mixing chamber, a spring normally malntaimng sald valve seated, connectlons between said diaphragm and said valve for causing the latter to be opened to l an extent in proportion to the pressure of nitrous oxid on said diaphragm, a passageway leading from said oxygen chamber to said valve, an auxiliary casing, avrotatable plug lvalve in said casing, a passageway leading from said oxygen chamber to said plug valve, a passageway leading from said plug valve-to said mixing chamber, and a baby inhaler connection leading from said auxiliary casing, said rotatable plug valve containing ports so arranged that for diilerent positions thereof oxygen may be delivered through said auxiliary casing into said baby inhaler connection or into said last mentioned passageway 'or may he shut oif from passing" 'through said auxiliary casing as desired.

5. An anaesthetizing apparatus comprising a mixing chamber, means for supplying oneof said gases into said "thesamef:

aphrgm,

second passageway for conductin I gas to t e outside surface of said a valve controlling a passageway forconducting the other of said gasesinto said chamber, means normally maintainin siaiid a; 'l phragm and said valve for causing the latter an extent i`n pro ortion to` the pressure of gas passing throug said s ec- Y valveseated, connections between sai to be opened -to ond passageway, and a passageway leading from said mixing chamber for mixed gases to an inhaler.

mixing cha'mber, means for' sup lying thereto from independent p sources o gases under pressure, controlling devices for the passageways leading to said mixing chamber, said controlling devices contaimng gas chambers for the two gases respectively,

a casing containing said mixing chamber, diaphragm constituting one said mixing chamber, a restricted passageway leading from one of said chambers into said mixing chamber, a second passageway leading from said last mentioned chamber to the outside surface of said diaphragm, a valve controlling a passageway from the other of said chambers into said mixing chamber, means normally maintaining said valve seated, connectionsbetween said diaphragm and said valve for causing the latter to be opened to an extent inproportion to the pressureofgas passingthrough said second passageway,

and a passageway leading from said mixing chamber for supplying the mixed gases to an inhaler.

` 7. -`An anaesthetizing apparatus having a.

mixing chamber, means for supplying thereto nitrous oxid and oxygen from independent sources of supply, controlling devices for the passages leading to said mixing chamber, said controlling devices containing gas chambers for nitrous oxid and oxygen respectively,

a casing containing said mixing chamber, a

diaphragm constituting one of the walls of said mixing chamber, a restricted passageway leading from said nitrous oxid chamber into said mixing chamber, an inhaler connection leading from said mixing chamber, a passageway leading from said nitrous oxid chamber to the outside -surface of said diaphragm, a valve controlling an opening for oxygen into said mixing chamber, a' spring normally maintaining said valve seated, and connections between said diaphragm and said valve for causing the latter to be openedto .an extent in proportion to the pressure of nitrous oxid on said diaphragm.

'In testimony whereof I hereuntoaix my signature. l JAY A. HEIDBBINK.

supplying the p 6. An anaesthetizing apparatus having a supply two a of the walls of 

